CN103343690B - Construction method of shaft antiseep structure used when large section of inclined shaft passes through aquifer - Google Patents
Construction method of shaft antiseep structure used when large section of inclined shaft passes through aquifer Download PDFInfo
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- CN103343690B CN103343690B CN201310317134.1A CN201310317134A CN103343690B CN 103343690 B CN103343690 B CN 103343690B CN 201310317134 A CN201310317134 A CN 201310317134A CN 103343690 B CN103343690 B CN 103343690B
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Abstract
Disclosed is a construction method of a shaft antiseep structure used when the large section of an inclined shaft passes through an aquifer. The shaft antiseep structure is a multilayer supporting structure of a mine laneway. The shaft antiseep structure comprises a primary support and a permanent support. Water-resisting layers are paved on the surface of the primary support and in the position between the primary support and the permanent support. The permanent support is a concrete masonry-lining support. A profile steel support is composed of an arch part support, a left side wall support, a right side wall support and an antiarch support, and a water filtering layer is arranged on the lower side of the antiarch support. The shaft antiseep structure solves the problem that shaft antiseep measures are not sufficient in the shaft construction process that the large section of the inclined shaft in a mine passes through the aquifer, and further solves the problems of being long in construction period and high in cost in a traditional inclined shaft unwatering and water retention technology.
Description
Technical field
The invention belongs to mining tunnel excavation field, particularly a kind of slope big cross section crosses pit shaft anti-leakage structure and the construction method thereof of water-bearing section.
Background technology
Inevitably run into aquifer in the exploitation of coal resources in recent years and the process of mine excavation, along with the progress of production technique, technician more and more proposes the concept of lasting exploit.In lasting exploit, water conservation is the prerequisite of construction, and pit shaft is the target that will reach by aquifer smoothly, therefore relate to water-retaining production and unstable soil layer two parts construction technology crossed by inclined shaft.
Present stage, the current comparative maturity of construction technology of unstable soil layer (aquifer) crossed by slope, developed multiple construction method, as churning method, and slip casting method, freezing process, well-point dewatering method etc.The control problem that focused on pit shaft top board of water-retaining production then by most construction method, does not relate to the antiseep problem of driving and the water conservation problem, particularly pit shaft in shaft building period, to the recovery of water resource and Utilizing question also without relating to.Concerning some aquifers are the area in key industry and living water use source, construction must guarantee that this aquifer water resource is not contaminated and destroy, therefore anti-seep measure and the construction method of inclined shaft big cross section being crossed to the water-retaining production measure, particularly pit shaft in aquifer all propose new requirement.
Summary of the invention
The object of this invention is to provide the construction method that a kind of inclined shaft big cross section crosses aquifer pit shaft anti-leakage structure, solving slope big cross section crosses in water-bearing section shaft construction process, the problem of the anti-seep measure deficiency of pit shaft, it is longer to solve traditional inclined shaft drainage water conservation technology duration, problem costly.
For achieving the above object, the present invention adopts following technical scheme:
A kind of inclined shaft big cross section crosses aquifer pit shaft anti-leakage structure, the multilayer supporting and protection structure of mine laneway, comprise preliminary bracing and permanent support, described preliminary bracing comprises steel pipe canopy, shape steel bracket and preliminary bracing concrete, described shape steel bracket is made up of arch support, leftwall support, RightWall support and antiarch support, described preliminary bracing concrete is made up of arch ring sprayed mortar, abutment wall sprayed mortar and antiarch cast-in-situ concrete
Arch water barrier and abutment wall water barrier is respectively equipped with between the preliminary bracing of arch, abutment wall and permanent support, the downside of described antiarch support is provided with drainage layer and antiarch water barrier from the bottom to top, the water barrier that described antiarch water barrier and abutment wall water barrier and arch water barrier link into an integrated entity
Described permanent support is that arch supporting built by concrete, and permanent support concrete is made up of abutment wall cast-in-situ concrete, arch cast-in-situ concrete and cast-in-situ concrete terrace.
Described arch ring sprayed mortar and abutment wall sprayed mortar are the plain concretes that concrete grade is at least C25, and the thickness sum of its jet thickness and shape steel bracket is at least 300mm.
Described water barrier is waterproof geotechnique layer of cloth.
Described antiarch cast-in-situ concrete, abutment wall cast-in-situ concrete and arch cast-in-situ concrete are add the concrete that BR type strengthens waterproof agent, label is at least C30, the thickness of described antiarch cast-in-situ concrete is 300mm ~ 600mm, and the thickness of described abutment wall cast-in-situ concrete and arch cast-in-situ concrete is at least 400mm.
Described drainage layer comprises filtrate and interval and is embedded in aqueduct in filtrate.
Inclined shaft big cross section crosses a construction method for the drainage water conservation of aquifer pit shaft anti-leakage structure, and construction sequence is as follows:
Step one: set up work plane drainage system;
Step 2: along the test observation well in the first Dewatering well in both sides of inclined shaft center line in roadway and pumped well;
Step 3: construction pipe well draws water the clear water regulating reservoir of pipeline and dewatering well;
Step 4: all the other dewatering wells of construction are continued in the both sides along inclined shaft center line in roadway;
Step 5: use water pumper to draw water drainage to dewatering well, through the drainage that draws water of dewatering well, groundwater table is down to below the base plate of work plane;
Step 6: the brill dress construction of steel pipe canopy in the preliminary bracing of inclines tunnel;
Step 7: use benching tunnelling method to carry out the excavation construction in pit shaft tunnel, first excavation construction is carried out to periphery of topping bar;
Step 8: the installation of arch support, comprises the welding of boring dress arch joist, laying dowel between reinforced mesh and adjacent two stands;
Step 9: arch ring sprayed mortar of constructing on the support of arch;
Step 10: the excavation construction at middle part of topping bar;
Step 11: the excavation construction of leftwall part of getting out of a predicament or an embarrassing situation;
Step 12: install leftwall support, abutment wall sprayed mortar that support is constructed;
Step 13: the excavation construction of RightWall part of getting out of a predicament or an embarrassing situation;
Step 14: install RightWall support, abutment wall sprayed mortar that support is constructed;
Step 15: lay drainage layer bottom roadway surrounding rock, bury aqueduct underground in filtrate;
Step 10 six: lay antiarch water barrier on drainage layer, described antiarch water barrier extends to abutment wall sprayed mortar surface;
Step 10 seven: install antiarch support and build antiarch cast-in-situ concrete on antiarch water barrier;
Step 10 eight: lay abutment wall water barrier on the surface of abutment wall sprayed mortar, at laying arch, the surface water barrier of arch ring sprayed mortar, abutment wall water barrier, arch water barrier and antiarch water barrier are connected as one;
Step 10 nine: in the surface construction abutment wall cast-in-situ concrete of abutment wall water barrier, in the surface construction arch cast-in-situ concrete of arch water barrier;
Step 2 ten: in surface construction cast-in-situ concrete terrace and the ditch of antiarch cast-in-situ concrete, make the permanent support of various piece be linked to be entirety.
The helically welded tube of placing along the borehole wall is provided with in described dewatering well, uniform multiple inlet opening, bottom of described helically welded tube, described inlet opening surface parcel nylon wire also uses waterproof silk thread colligation consolidation, fills up dewatering well filtrate outside the helically welded tube within the scope of the borehole wall.
The equidistant both sides being evenly distributed on inclined shaft center line in roadway of described dewatering well.
The construction sequence of described dewatering well comprises that rig type selecting, driller insertion and adjustment, rock core are sampled, downhole pipe, fill out filtrate, well-flushing, examination take out precipitation.
Compared with prior art the present invention has following characteristics and beneficial effect:
In the present invention, in pit shaft anti-leakage structure, the shaft construction that water-retaining production and inclined shaft big cross section cross aquifer of being set to of water barrier passes rapidly through moisture sandy gravel stratum and lays the first stone.
Traditional entirety excavation is compared in construction method of the present invention, first periphery of topping bar is excavated, reduce excavation space, decrease exposure sandstone to flow in well, can prevent unstable soil layer from causing tunnel to collapse to emit due to excessive excavation, guarantee construction safety, accelerate construction speed, for construction in later period creates very favourable condition.
In the present invention, inclined shaft big cross section does not destroy anaplerotic sequence, the flow direction of periphery water system after crossing aquifer, particularly compares low cost with the scheme such as " grouting curtain method " and " freezing process ", shortens the duration, improve workmanship and ensure construction safety.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 be in the present invention inclined shaft big cross section cross aquifer pit shaft anti-leakage structure and construction method step of the present invention 20 complete after shaft structure schematic diagram.
Fig. 2 is the cross-sectional view of dewatering well.
Fig. 3 is inclined shaft and dewatering well facade SEA LEVEL VARIATION schematic diagram.
Fig. 4 is work plane drainage system schematic diagram.
Fig. 5 is the upper and lower circulating system schematic diagram of water resource in dewatering well.
Fig. 6 is the layout schematic diagram of dewatering well in construction method step two of the present invention and step 4.
Fig. 7 is the shaft structure schematic diagram after construction method step six of the present invention completes.
Fig. 8 is the shaft structure schematic diagram after construction method step seven of the present invention completes.
Fig. 9 is the shaft structure schematic diagram after construction method step eight of the present invention completes.
Figure 10 is the shaft structure schematic diagram after construction method step nine of the present invention completes.
Figure 11 is the shaft structure schematic diagram after construction method step ten of the present invention completes.
Figure 12 is the shaft structure schematic diagram after construction method step 11 of the present invention completes.
Figure 13 is the shaft structure schematic diagram after construction method step 12 of the present invention completes.
Figure 14 is the shaft structure schematic diagram after construction method step 13 of the present invention completes.
Figure 15 is the shaft structure schematic diagram after construction method step 14 of the present invention completes.
Figure 16 is the shaft structure schematic diagram after construction method step 15 of the present invention completes.
Figure 17 is the shaft structure schematic diagram after construction method step 16 of the present invention completes.
Figure 18 is the shaft structure schematic diagram after construction method step 17 of the present invention completes.
Figure 19 is the shaft structure schematic diagram after construction method step 18 of the present invention completes.
Figure 20 is the shaft structure schematic diagram after construction method step 19 of the present invention completes.
Reference numeral: 1-steel pipe canopy, 2-shape steel bracket, 2.1-arch support, 2.2-leftwall support, 2.3-RightWall support, 2.4-antiarch support, 3-preliminary bracing concrete, 3.1-arch ring sprayed mortar, 3.2-abutment wall sprayed mortar, the cast-in-situ concrete of 3.3-antiarch, 4-permanent support concrete, the cast-in-situ concrete of 4.1-abutment wall, the cast-in-situ concrete of 4.2-arch, 4.3-cast-in-situ concrete terrace, 5-dewatering well, 5.1-observation well, 5.2-pumped well, 6-mine laneway, 7-inclined shaft center line in roadway, 8-tops bar periphery, in the middle part of 9-tops bar, 10-gets out of a predicament or an embarrassing situation leftwall part, 11-gets out of a predicament or an embarrassing situation RightWall part, 12-water barrier, 12.1-antiarch water barrier, 12.2-abutment wall water barrier, 12.3-arch water barrier, 13-filtrate, 14-aqueduct, 15-terrace, 16-helically welded tube, 17-dewatering well filtrate, 19-ditch.
Detailed description of the invention
Embodiment is shown in Figure 1, a kind of inclined shaft big cross section crosses aquifer pit shaft anti-leakage structure, the multilayer supporting and protection structure of mine laneway 6, comprise preliminary bracing and permanent support, described preliminary bracing comprises steel pipe canopy 1, shape steel bracket 2 and preliminary bracing concrete 3, described shape steel bracket 2 is made up of arch support 2.1, leftwall support 2.2, RightWall support 2.3 and antiarch support 2.4, described preliminary bracing concrete 3 is made up of arch ring sprayed mortar 3.1, abutment wall sprayed mortar 3.2 and antiarch cast-in-situ concrete 3.3
Arch water barrier 12.3 and abutment wall water barrier 12.2 is respectively equipped with between the preliminary bracing of arch, abutment wall and permanent support, the downside of described antiarch support 2.4 is provided with drainage layer and antiarch water barrier 12.1 from the bottom to top, the water barrier 12 that described antiarch water barrier 12.1 links into an integrated entity with abutment wall water barrier 12.2 and arch water barrier 12.3
Described permanent support is that arch supporting built by concrete, and permanent support concrete 4 is made up of abutment wall cast-in-situ concrete 4.1, arch cast-in-situ concrete 4.2 and cast-in-situ concrete terrace 4.3.
Described arch ring sprayed mortar 3.1 and abutment wall sprayed mortar 3.2 are plain concretes that concrete grade is at least C25, and the thickness sum of its jet thickness and shape steel bracket is at least 300mm.
Described water barrier 12 is waterproof geotechnique layer of cloths.
Described antiarch cast-in-situ concrete 3.3, abutment wall cast-in-situ concrete 4.1 and arch cast-in-situ concrete 4.2 are add the concrete that BR type strengthens waterproof agent, label is at least C30, the thickness of described antiarch cast-in-situ concrete 3.3 is 300mm ~ 600mm, and the thickness of described abutment wall cast-in-situ concrete 4.1 and arch cast-in-situ concrete 4.2 is at least 400mm.
Described drainage layer comprises filtrate 13 and interval and is embedded in aqueduct 14 in filtrate.
Apply the construction method that above-described inclined shaft big cross section crosses the drainage water conservation of aquifer pit shaft anti-leakage structure, construction sequence is as follows:
Step one: shown in Figure 4, sets up work plane drainage system;
Step 2: shown in Figure 6, along the test observation well 5.1 in the first Dewatering well 5 in both sides of inclined shaft center line in roadway 7 and pumped well 5.2;
Step 3: shown in Figure 5, construction pipe well draws water the clear water regulating reservoir of pipeline and dewatering well;
Step 4: shown in Figure 6, all the other dewatering wells of construction are continued in the both sides along inclined shaft center line in roadway 7;
Step 5: shown in Figure 3, use water pumper to draw water drainage to dewatering well 5, through the drainage that draws water of dewatering well, groundwater table is down to below the base plate of work plane, reduces s highly as illustrated in the drawing;
Step 6: shown in Figure 7, the brill dress construction of steel pipe canopy 1 in the preliminary bracing of inclines tunnel;
Step 7: shown in Figure 8, uses benching tunnelling method to carry out the excavation construction in pit shaft tunnel, first carries out excavation construction to periphery 8 of topping bar;
Step 8: shown in Figure 9, the installation of arch support 2.1, comprises the welding of boring dress arch joist, laying dowel between reinforced mesh and adjacent two stands;
Step 9: shown in Figure 10, arch ring sprayed mortar 3.1 that arch support 2.1 is constructed;
Step 10: shown in Figure 11, the excavation construction at middle part 9 of topping bar;
Step 11: shown in Figure 12, the excavation construction of leftwall part 10 of getting out of a predicament or an embarrassing situation;
Step 12: shown in Figure 13, installs leftwall support 2.2, and leftwall support 2.2 and arch support 2.1 are connected as a single entity, abutment wall sprayed mortar 3.2 that on the left side wall bracket is constructed;
Step 13: shown in Figure 14, the excavation construction of RightWall part 11 of getting out of a predicament or an embarrassing situation;
Step 14: shown in Figure 15, installs RightWall support 2.3, and RightWall support 2.3 and arch support 2.1 are connected as a single entity, abutment wall sprayed mortar 3.2 of on the right wall bracket being constructed;
Step 15: shown in Figure 16, lays drainage layer bottom roadway surrounding rock, bury aqueduct 14 in filtrate 13 underground;
Step 10 six: shown in Figure 17, drainage layer is laid antiarch water barrier 12.1, and described antiarch water barrier 12.1 extends to abutment wall sprayed mortar surface, for the connection with abutment wall water barrier in subsequent construction, ensures that the water of abutment wall and arch is taken advantage of a situation downwards;
Step 10 seven: shown in Figure 18, antiarch water barrier 12.1 is installed antiarch support 2.4 and builds antiarch cast-in-situ concrete 3.3, and antiarch support 2.4 and left and right abutment wall support are connected as a single entity;
Step 10 eight: shown in Figure 19, abutment wall water barrier 12.2 is laid on the surface of abutment wall sprayed mortar 3.2, at laying arch, the surface water barrier 12.3 of arch ring sprayed mortar 3.1, abutment wall water barrier 12.2, arch water barrier 12.3 and antiarch water barrier 12.1 are connected as one, ensures the sealing of water barrier;
Step 10 nine: shown in Figure 20, in the surface construction abutment wall cast-in-situ concrete 4.1 of abutment wall water barrier 12.2, in the surface construction arch cast-in-situ concrete 4.2 of arch water barrier 12.3;
Step 2 ten: shown in Figure 1, in surface construction cast-in-situ concrete terrace 4.3 and the ditch 19 of antiarch cast-in-situ concrete 3.3, makes the permanent support of various piece be linked to be entirety.
Shown in Figure 2, the helically welded tube 16 of placing along the borehole wall is provided with in described dewatering well 5, uniform multiple inlet opening, bottom of described helically welded tube 16, described inlet opening surface parcel nylon wire also uses waterproof silk thread colligation consolidation, in case foreign material clog inlet opening, dewatering well filtrate 17 is filled up outside helically welded tube 16 within the scope of the borehole wall, the caliber of helically welded tube 16 described in the present embodiment is φ 325mm, wall thickness 6mm, uniform multiple inlet opening, 40m place, bottom of helically welded tube 16, its aperture is φ 25, is 100mm pitch arrangement by density.
The equidistant both sides being evenly distributed on inclined shaft center line in roadway 7 of described dewatering well 5.
The construction sequence of described dewatering well comprises that rig type selecting, driller insertion and adjustment, rock core are sampled, downhole pipe, fill out filtrate, well-flushing, examination take out precipitation.
In mine design and shaft building process, lasting exploit, ecological environmental protection and fwaater resources protection should be classified as overriding concern factor." circular economy concept " of the construction of drainage water conservation will be rooted in the hearts of the people more in the area that water resource is the deficientest.Realize Coal Resource Development and utilize the coordinated development protected with ecology of mining areas, develop significant for promotion national economy and Community health.
Drainage water conservation Construction Principle in the present invention: (1) drainage is by calculating periphery geological conditions and hydrologic regime detection analysis and precipitation parameter, set up surface drainage system, stifled husky, the water guide technique of deep hole dewatering well crossover distance, water delivery step-down and work plane is utilized when manual control, eliminate in mine construction and manufacturing process that moisture sandy gravel stratum is on the impact of mine safety, its substance can be divided into drainage and water delivery step-down two aspects.Wherein, drainage refers to is down to below mine construction layer position absolute altitude by the hydrophobic water level by aquifer, or causes stable cone of depression, makes it local drainage, and when avoiding developing, aquifer water directly pours in work plane.Draining hook refers to by hydrophobic by under aquifer water potential drop to the safe absolute altitude that designs in advance, thus alleviates or eliminates mine and to open up and in manufacturing process, aquifer water is destroyed its upper and lower water barrier and poured in mine under effect of water pressure.Regulate inflow rate of mine water, improve underground work condition and ensure slope development safety.(2) drainage water conservation is according near point drainage pump-out, water burst in face amount, ground underground hydrological geological conditions and water demand and service condition, sets up rational groundwater mining, surface water purification, characterization processes flow process and water-source recovering-utilizing system.(3) according to water conservation requirement, the design of pit shaft antiseep support pattern is carried out.Mainly comprise preliminary bracing, water barrier, permanent support.The object of preliminary bracing is quickly through moisture sandy gravel stratum, prevents tunnel from collapsing and emits, guarantee construction safety, for construction in later period creates conditions.Water barrier: after having crossed the preliminary bracing of tunnel, aquifer, before permanent support, tunneling boring lays waterproof geotextiles, permanent support: adopt strong concrete to carry out the supporting of block arch, adds BR series enhancement mode waterproof agent in concrete; Lay the drainage layer be made up of rubble and aqueduct under antiarch support, described aqueduct can use PPC plastics porous aqueduct, then builds antiarch cast-in-situ concrete to tunnel design elevation.
After the present invention has constructed; according to well point drainage pump-out, water burst in face amount, ground underground hydrological geological conditions and water demand and service condition; set up rational groundwater mining, surface water purification, characterization processes flow process and water-source recovering-utilizing system; achieve the coordinated development that ecological environmental protection, fwaater resources protection and ecology of mining areas are protected; be applied in shaft building work progress with lasting exploit and fwaater resources protection theory, realize green shaft building construction.As shown in Figure 5; establish the upper and lower circulating system of underground water well in slope construction process, define a set of Comprehensive Construction meeting water conservation, the labor safety condition of earth's surface construction is better; tissue flexibly; not polluted source, the water that construction period takes out carries out reuse by simple facility, does not affect nearby residents water; do not destroy water system; safety is secure, low in the pollution of the environment, good in economic efficiency, is convenient to control, and is convenient to implement the protection to water resource.
The invention solves inclined shaft big cross section and pass through a sandy conglomerate aquifer water conservation construction technology difficult problem, and be that the similar water conservation of aqueous stream sand bed excessively construction from now on provides successful experience.
Claims (4)
1. an inclined shaft big cross section crosses the construction method of aquifer pit shaft anti-leakage structure, it is characterized in that, described inclined shaft big cross section crosses the multilayer supporting and protection structure that aquifer pit shaft anti-leakage structure is mine laneway (6), comprise preliminary bracing and permanent support, described preliminary bracing comprises steel pipe canopy (1), shape steel bracket (2) and preliminary bracing concrete (3), described shape steel bracket (2) is by arch support (2.1), leftwall support (2.2), RightWall support (2.3) and antiarch support (2.4) composition, described preliminary bracing concrete (3) is by arch ring sprayed mortar (3.1), abutment wall sprayed mortar (3.2) and antiarch cast-in-situ concrete (3.3) composition,
Arch water barrier (12.3) and abutment wall water barrier (12.2) is respectively equipped with between the preliminary bracing of arch, abutment wall and permanent support, the downside of described antiarch support (2.4) is provided with drainage layer and antiarch water barrier (12.1) from the bottom to top, the water barrier (12) that described antiarch water barrier (12.1) links into an integrated entity with abutment wall water barrier (12.2) and arch water barrier (12.3)
Described permanent support is that arch supporting built by concrete, and permanent support concrete (4) is made up of abutment wall cast-in-situ concrete (4.1), arch cast-in-situ concrete (4.2) and cast-in-situ concrete terrace (4.3);
Described arch ring sprayed mortar (3.1) and abutment wall sprayed mortar (3.2) are the plain concretes that concrete grade is at least C25, and the thickness sum of its jet thickness and shape steel bracket is at least 300mm;
Described water barrier (12) is waterproof geotechnique layer of cloth;
Described antiarch cast-in-situ concrete (3.3), abutment wall cast-in-situ concrete (4.1) and arch cast-in-situ concrete (4.2) are add the concrete that BR type strengthens waterproof agent, label is at least C30, the thickness of described antiarch cast-in-situ concrete (3.3) is 300mm ~ 600mm, and the thickness of described abutment wall cast-in-situ concrete (4.1) and arch cast-in-situ concrete (4.2) is at least 400mm;
Described drainage layer comprises filtrate (13) and interval and is embedded in aqueduct (14) in filtrate;
The construction sequence of the drainage water conservation of this structure is as follows:
Step one: set up work plane drainage system;
Step 2: along the test observation well (5.1) in first Dewatering well (5) in both sides of inclined shaft center line in roadway (7) and pumped well (5.2);
Step 3: construction pipe well draws water the clear water regulating reservoir of pipeline and dewatering well;
Step 4: all the other dewatering wells of construction are continued in the both sides along inclined shaft center line in roadway (7);
Step 5: use water pumper to draw water drainage to dewatering well (5), through the drainage that draws water of dewatering well, groundwater table is down to below the base plate of work plane;
Step 6: the brill dress construction of steel pipe canopy (1) in the preliminary bracing of inclines tunnel;
Step 7: use benching tunnelling method to carry out the excavation construction in pit shaft tunnel, first excavation construction is carried out to periphery of topping bar (8);
Step 8: the installation of arch support (2.1), comprises the welding of boring dress arch joist, laying dowel between reinforced mesh and adjacent two stands;
Step 9: at arch support (2.1) upper construction arch ring sprayed mortar (3.1);
Step 10: the excavation construction at middle part (9) of topping bar;
Step 11: the excavation construction of leftwall part (10) of getting out of a predicament or an embarrassing situation;
Step 12: install leftwall support (2.2), abutment wall sprayed mortar (3.2) that support is constructed;
Step 13: the excavation construction of RightWall part (11) of getting out of a predicament or an embarrassing situation;
Step 14: install RightWall support (2.3), abutment wall sprayed mortar (3.2) that support is constructed;
Step 15: lay drainage layer bottom roadway surrounding rock, buries aqueduct (14) underground in filtrate (13);
Step 10 six: lay antiarch water barrier (12.1) on drainage layer, described antiarch water barrier (12.1) extends to abutment wall sprayed mortar surface;
Step 10 seven: above install antiarch support (2.4) at antiarch water barrier (12.1) and build antiarch cast-in-situ concrete (3.3);
Step 10 eight: lay abutment wall water barrier (12.2) on the surface of abutment wall sprayed mortar (3.2), in the laying arch, surface water barrier (12.3) of arch ring sprayed mortar (3.1), abutment wall water barrier (12.2), arch water barrier (12.3) and antiarch water barrier (12.1) are connected as one;
Step 10 nine: in the surface construction abutment wall cast-in-situ concrete (4.1) of abutment wall water barrier (12.2), in the surface construction arch cast-in-situ concrete (4.2) of arch water barrier (12.3);
Step 2 ten: in surface construction cast-in-situ concrete terrace (4.3) and ditch (19) of antiarch cast-in-situ concrete (3.3), make the permanent support of various piece be linked to be entirety.
2. inclined shaft big cross section according to claim 1 crosses the construction method of aquifer pit shaft anti-leakage structure, it is characterized in that: in described dewatering well (5), be provided with the helically welded tube (16) of placing along the borehole wall, uniform multiple inlet opening, bottom of described helically welded tube (16), described inlet opening surface parcel nylon wire also uses waterproof silk thread colligation consolidation, and dewatering well filtrate (17) is filled up in helically welded tube (16) outside within the scope of the borehole wall.
3. inclined shaft big cross section according to claim 1 and 2 crosses the construction method of aquifer pit shaft anti-leakage structure, it is characterized in that: the equidistant both sides being evenly distributed on inclined shaft center line in roadway (7) of described dewatering well (5).
4. inclined shaft big cross section according to claim 1 and 2 crosses the construction method of aquifer pit shaft anti-leakage structure, it is characterized in that: the construction sequence of described dewatering well comprises that rig type selecting, driller insertion and adjustment, rock core are sampled, downhole pipe, fill out filtrate, well-flushing, examination take out precipitation.
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| CN105804772A (en) * | 2016-05-05 | 2016-07-27 | 中铁第勘察设计院集团有限公司 | Active and passive combined waterproof structure for tunnel |
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| CN101737063A (en) * | 2009-11-16 | 2010-06-16 | 西安理工大学 | Ground fissure tunnel asphalt concrete composite lining and supporting method thereof |
| CN101906975A (en) * | 2010-08-09 | 2010-12-08 | 中铁第一勘察设计院集团有限公司 | Supporting structure for extra-large cross-section loess tunnel underpass railway and construction method thereof |
| CN202360109U (en) * | 2011-12-16 | 2012-08-01 | 中铁第四勘察设计院集团有限公司 | Composite-lining fully-closed waterproof construction |
| CN203441498U (en) * | 2013-07-26 | 2014-02-19 | 中鼎国际工程有限责任公司 | Anti-seepage structure for large-section water-bearing layer passing shaft of inclined shaft |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07127374A (en) * | 1993-11-05 | 1995-05-16 | Maeda Corp | Method for constructing tunnel |
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| SU1273582A1 (en) * | 1985-07-24 | 1986-11-30 | Специальное конструкторско-технологическое бюро Института геотехнической механики АН УССР | Method of of bolting rock without hole-drilling |
| CN101737063A (en) * | 2009-11-16 | 2010-06-16 | 西安理工大学 | Ground fissure tunnel asphalt concrete composite lining and supporting method thereof |
| CN101906975A (en) * | 2010-08-09 | 2010-12-08 | 中铁第一勘察设计院集团有限公司 | Supporting structure for extra-large cross-section loess tunnel underpass railway and construction method thereof |
| CN202360109U (en) * | 2011-12-16 | 2012-08-01 | 中铁第四勘察设计院集团有限公司 | Composite-lining fully-closed waterproof construction |
| CN203441498U (en) * | 2013-07-26 | 2014-02-19 | 中鼎国际工程有限责任公司 | Anti-seepage structure for large-section water-bearing layer passing shaft of inclined shaft |
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| CN103343690A (en) | 2013-10-09 |
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